Mac OS X 10.6: Choosing color profiles for a display
Display Calibrator Assistant creates a ColorSync profile when you calibrate your display. You can switch between different color profiles for your display using Displays preferences.
To choose a color profile for a display:
Open System Preferences, click Displays, and then click Color.
Select a profile in the Display Profile list.
If you have more than one display, you can assign a different color profile to each display. Choose the profile for each display using the Displays preferences pane that appears on that display.